<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
        table{
            border-collapse: collapse;
        }
        th{
            color: red;
        }
    </style>
</head>
<body>
    <!-- bgcolor
            background: 背景   color是颜色的意思      gold是金色     skyblue天空蓝
    -->
    <table border="1" width="460px" align="center">
        <caption>值日表</caption>
        <thead>
            <tr bgcolor="gold">
                <th>星期一</th>
                <th>星期二</th>
                <th>星期三</th>
                <th>星期四</th>
                <th>星期五</th>
                <th>星期六</th>
            </tr>
        </thead>
        <tbody>
            <tr>
                <td>1-1</td>
                <td>1-2</td>
                <td>1-3</td>
                <td>1-4</td>
                <td>1-5</td>
                <td>1-6</td>
            </tr>
            <tr>
                <td>2-1</td>
                <td>2-2</td>
                <td>2-3</td>
                <td>2-4</td>
                <td>2-5</td>
                <td>2-6</td>
            </tr>
            <tr>
                <td>3-1</td>
                <td>3-2</td>
                <td colspan="2" rowspan="2">3-3</td>
                <td>3-5</td>
                <td>3-6</td>
            </tr>
            <tr>
                <td>4-1</td>
                <td>4-2</td>
                <td>4-5</td>
                <td>4-6</td>
            </tr>
            <tr>
                <td colspan="2" rowspan="3">5-1</td>
                <td>5-3</td>
                <td>5-4</td>
                <td>5-5</td>
                <td>5-6</td>
            </tr>
            <tr>
                <td>6-3</td>
                <td>6-4</td>
                <td>6-5</td>
                <td>6-6</td>
            </tr>
            <tr>
                <td>7-3</td>
                <td colspan="3">7-4</td>
            </tr>
        </tbody>
    </table>
</body>
</html>